ABSTRACT
The knowledge of the heart and its functions is increasing every day. However, many cardiac dysfunctions remain undocumented. One of them might be the presence of the Wellens' sign, minimally elevated or isoelectric ST segments, and inverted T waves in the precordial leads, without changes in the QRS complex, together with a shortened of "P-R and Q-T intervals" in the same electrocardiographic record. Both patterns are greatly underdiagnosed. The key to an accurate diagnosis of both dysfunctions must begin with a detailed analysis of all the symptoms reported by the patient. The ECG recording provides an almost definitive confirmation: The T-wave characteristics in precordial derivations. The duration of P-R and Q-T intervals.
Subject(s)
Acute Coronary Syndrome/diagnosis , Acute Coronary Syndrome/physiopathology , Coronary Stenosis/diagnosis , Coronary Stenosis/physiopathology , Electrocardiography , Acute Coronary Syndrome/surgery , Adult , Biomarkers/analysis , Coronary Angiography , Coronary Stenosis/surgery , Diagnosis, Differential , Humans , Male , Tomography, Emission-Computed, Single-PhotonSubject(s)
Death, Sudden, Cardiac , Electrocardiography , Adult , Humans , Male , Torsades de Pointes/physiopathologyABSTRACT
No disponible
No disponible
Subject(s)
Humans , Male , Adult , Death, Sudden/etiology , Death, Sudden/pathology , Tachycardia, Supraventricular/complications , Tachycardia, Supraventricular/mortality , Electrocardiography/methods , Chorea/complications , Electrocardiography, Ambulatory/instrumentation , Ergometry/methodsABSTRACT
The electrical cardiac systole originates from the beginning of the P wave (atrial depolarisation) until the end of the downward branch of the T wave (ventricular repolarisation). It includes, therefore, succession P-QRS-T and its corresponding intervals and segments: PQ, ST, and QT. The mathematical possibilities of variability in the length of the electrical systole of the heart may be diverse. It is well documented and established that such changes in length may make the myocardial cells more vulnerable and unstable, and may also cause serious cardiac arrhythmias and even sudden death. The current presentation illustrates these electrocardiographic entities with significant variations in the length of its waves and intervals: short PQ and QT intervals, short PQ and long QT, long PQ and long QT. All parameters appeared in young adult males.
ABSTRACT
UNLABELLED: A 37 year-old male, with nocturnal tachycardias and three accesses of true syncopes related to strain has familiar antecedents of two sudden deaths; his father, 55 years, for sudden cardiac death and one brother died, 22 months infant, of sudden death. In a detailed exam, we observed that the patient has a short PQ interval and a short QT (Bazett and Fridericia's Formulas) with a risk of sudden cardiac death, according to the scale of Schwartz, 4.5/4 points. In the first impression, the interpretation of the EKG outline induces to think of Lown-Ganong-Levine's Syndrome. In a more detailed exam we observed that as the interval in this syndrome is normal, it is short in patient's (Short QTc-f interval). Two possibilities: an unknown variant of L-G-L's Syndrome and a new syndrome. METHODS: Exhaustive measurements of the electrocardiographic intervals, segments and waves. Technique of measurement: MioLaserTool Pixruler. RESULTS: Short PQ and QT intervals. The RR interval: 0.860 s. The QT interval: 0.29 s. Bazett's Formula: 0.312 s. PQ Interval: 0.10-0.11 s. DISCUSSION: An electrocardiographic pattern unknown, shortening (Decrease) of electrical cardiac systole or stimulation accelerated auricle-ventricular with precocious ventricular repolarization. CONCLUSIONS: To make aware to the physicians the necessity to construct an exhaustive measurement of these parameters, in the cases those indicate pathology in the cardiac sphere.